• Whether the fuel price is a key factor in the development of electric vehicles (EV)?
• How do fuel taxes affect the sales of EV?
• What are the trends in EV sales by different manufacturers?
• How fast-growing is the EV business?
• Are there more people driving EVs in a more wealthy state?

• DOE Alternative Fuels Data Center (https://afdc.energy.gov/data)
  • Average retail fuel prices in the US
  • Fuel taxes by country
  • EV sales in the US by model
  • Number of vehicles registrations by state and by energy type
• International Energy Agency (https://www.iea.org/data-and-statistics)
  • Electric car registrations in United States and Europe
• United Census Bureau (link)
  • US median income by state

Inflation-adjusted gasoline prices were calculated based on: \(P_{2023} = P \times Inflation factor\).

• Switzerland, Iceland, Mexico, and the US are the only countries with higher taxes on diesel than gasoline.
• In general, European countries tend to tax petroleum fuels at the highest level globally.

• Retrieve data from DOE Alternative Fuels Data Center.
• Line chart - Fuel prices could be a factor in the EV market.
• Bar chart - Taxes do affect the EV market.
• Stacked bar chart - Tesla is the leading EV manufacturer in the US.
• Shiny APP map + Scatter / Line chart - EV business is rising but sill extremely small compared to gas cars. The growths are most notable in wealthier states.